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ok new rules are out
Flywheels:
-[STOCK TYPE ONLY] must weight 18.5lbs. - no less
OEM appearing cltch and plate.
ok so no matter what flwheel has to be 18.5 lbs
we can run any oem clutch and plate witch stock setup would be the lightest out there no afraid to re drill to make work. Just trying to get any advantage i can within our rules.
A stock 2.3 flywheel weighs 21 lbs.Chuck it up in the lathe and remove some of the lip under the ring gear.You should be able to remove enough to get you close to the weight you need.
On the clutch side take a look at 10,000 RPM
http://www.10000rpm.com/index.php?op...d=67&Itemid=67
Whatever you do make sure you have someone balance the flywheel and pressure plate together after you finish machine work
Please think twice about machining that stock flywheel. Since it's cast and not made from solid steel you run a chance of it coming apart at high RPMs after machining. I'd suggest the 16 pound Zoom flywheel and hope you don't get checked. Better to take a chance on that than take a chance on an exploded cast wheel.
have a stock flywheel thats 18.5 lbs already. they do check the on a regular bases thanks for the info guys
how do they check them. do they make you pull trany and take them off the motor
Don"t cheat. If you have to cheat to win, you have not won anything. When you win given the same rules then you have a true accomplishment. If you're ever caught then you will be branded a cheater for a long time.
The early Pinto had an 7.5" clutch. That will most likely be the lightest of the stock appearing clutches. It uses the same bolt pattern as the 8.5" clutch. Cutting down the stock flywheel is extremely iffy. Thay are made of cast iron and will come apart, what are you're feet and ? worth. Most aftermarket billit flywheels can be had in a multitude of weights.
Yes they make us pull them after the race.
we run cut cast wheels down to 18.5lbs they seem to hold up ok we take off clutch surface it don't take a hole lot when you do it that way the flywheels still over an 1.5" thick.
and yes they do pull them out and weigh them on a certified meat scale here anyways.
just looking for options OEM appearing cltch and plate. is the rule.
so a Honda or anything would be ok just trying to find the lightest oem i could easily get from the wrecks without spending a bunch on aftermarket
I'm not a fan of lightening cast flywheels at all but where you trying to remove a couple of pounds it should be OK to remove that from the face of the flywheel or even a little from the back side. BUT and that is a big but you must hade a very good radius on any transitions where you cut, any sharp corners will run the risk if it exploding.
That said, it would be more benificial for you to get a 18.5 lb steel flywheel. As old Rob said a cast flywheel is always iffy even stock un-touched ones.
If you have a 23 spline tranny, then like Old Rob said, use the disc off a 71-72 Pinto with a 1600cc and German transmission. Use the pressure plate from a 91-96 Escort with the 1.9L ... it will bolt right up, and is substantially lighter than the stock Mustang one.
With this setup, you need to either lengthen the pivot bolt for your clutch arm (you can use a carriage bolt), or use the throw out bearing from a 72 Chevy 1/2 ton truck with a 250 6 cyl. The pressure plate is a little thinner, and you need to make up that distance to disengage the clutch.
buy the light weight one and add lead to very center closer to center the betterQuote:
Originally Posted by supertruck